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📘 A dry seed is alive but paused

A mature seed protects a tiny plant embryo inside a coat and stores food for the first stage of growth.

3
lessons
~15 min
to learn
Adults
level
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What you’ll learn

  1. Water and restartTrace imbibition, rehydration, and hormone control as a seed wakes.Water uptake restarts metabolism while ABA and gibberellins set the timing.
  2. Fuel for growthExplain reserve mobilization, respiration, and cell expansion.Enzymes and ATP power growth before photosynthesis can supply the seedling.
  3. Emerging seedlingFollow radicle and shoot emergence through seedling establishment.The radicle anchors first; the shoot then moves toward light and independence.

Questions this course answers

What is imbibition?

Imbibition is the initial uptake of water by dry seed materials, causing rehydration and swelling.

Which hormone generally promotes germination by opposing dormancy?

Gibberellins promote germination, while ABA commonly helps maintain dormancy.

Why does a germinating seed need oxygen?

Aerobic respiration uses oxygen to help produce ATP for transport, synthesis, and growth.

What do amylase enzymes help release from a starch-rich seed reserve?

Amylases break starch into smaller sugars that can be transported and used for energy or construction.

What is the radicle?

The radicle is the first embryonic root and commonly the first visible structure to emerge.

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